JP2017524497A - Film modified dental prosthesis with improved properties - Google Patents

Abstract

The present invention relates to a dental prosthesis (in particular, a ready-made tooth replacement) with an integrated film layer. Preferably, the dental prosthesis is constructed in layers, the prosthesis comprising an inner tooth, a film on the inner tooth, and additional teeth outside the film (eg, veneer and / or incisor shell). . A method of manufacturing a dental prosthesis is also the subject of the present invention. [Selection] Figure 3

Description

  The present invention relates to a dental prosthesis, in particular a ready-made tooth replacement, wherein a film layer is integrated into the dental prosthesis. The dental prosthesis is constructed in layers, the prosthesis including an inner tooth, a film on the inner tooth, and additional teeth outside the film (eg, veneer and / or incisor shell). It is preferable. A method of manufacturing the dental prosthesis is also the subject of the present invention.

  So far, ready-made tooth replacements are available as types made of various materials. Usually, ready-made tooth replacements are based on acrylate or methacrylate polymers that can be produced with or without a filling agent.

  The teeth show good stability against daily mechanical stress. However, in the past decade, ready-made tooth replacements have been used in the manufacture of implant-supported dental restorations as well as in replaceable dental restorations and hybrid or telescopic prostheses as total prostheses. Even more and more are being used. Implant-supported dental restorations are subject to higher mechanical stresses. Furthermore, there is a tendency to receive an inappropriate burden. As a result, damage may occur, particularly in the area of the front teeth. Such breakage reduces stress in other components of the dental restoration (eg, existing implants) and is not an essential problem. However, it is a problem that some of the dental restoration is peeled off or missing.

  Therefore, it was an object to provide a dental prosthesis capable of preventing a part of the prosthesis from being chipped for at least a certain period after the breakage is formed. In particular, a tooth (e.g., a ready-made tooth replacement) that does not show chipping in a portion of the tooth after a fracture has formed will be provided. Furthermore, a method for manufacturing the dental prosthesis is provided.

  This object is achieved by a dental prosthesis according to claim 1 and a method according to claim 9.

FIG. 1A shows a partially completed tooth with an integrated film. FIG. 1B shows the completed tooth with an integrated film that does not affect the optical properties. FIG. 1C shows a cross-sectional view of a tooth having a visually transparent film. FIG. 1D shows a cross-sectional view of a tooth having a visually transparent film. FIG. 1E is a front view of a damaged tooth. FIG. 1F is a side view of a damaged tooth. FIG. 1G shows a broken tooth, with the debris remaining bonded to the stump by the film material. FIG. 1H shows a broken tooth, with the debris remaining bonded to the stump by the film material. FIG. 2A shows a partially completed tooth with an integrated colored film. FIG. 2B shows the completed tooth with an integrated colored film. FIG. 3 shows a schematic view of a cross-sectional image of a ready-made tooth replacement 0 comprising an incisor shell 1 in the form of a further tooth layer, a film layer 2 and an inner tooth part 3.

  The subject of the present invention is a dental prosthesis in which at least one film layer is integrated. Another subject of the present invention is a prosthesis (in particular a tooth, veneer, bridge or crown) with an integrated film in the cheek or lip position. More preferably, the teeth alternatively or additionally comprise an integrated film in the occlusal and / or proximate position. Also preferred are dental prostheses, in particular dental prostheses in the form of teeth comprising a film layer in an integrated manner, wherein the film layer is preferably (a) buccal side, (b) cheek. Side and mesial plane side and / or occlusal plane side, (c) occlusal plane side, (d) buccal side of occlusal plane, (e) cut end side, (d) cut end side and buccal side, (g) buccal side, It is also preferable to arrange on the occlusal side and the adjacent side, (h) the cut end side and the adjacent side. The film is preferably provided with a further tooth layer (for example, an outer tooth layer). The outer tooth layer may be a veneer similar to a dentin layer.

  It will be understood that the prosthesis according to the present invention is a prosthetic restoration that can be a prosthetic dental form body. The prosthetic restoration can be part of a fixed dental restoration or part of a removable dental restoration (eg, a hybrid prosthesis).

  By using a tough elastic and / or thermoplastic film integrated between the layers of a dental prosthesis (eg tooth), preventing a portion of the prosthesis from being chipped even after a break has formed Is possible.

  Furthermore, artificial teeth and ready-made veneers are limited in thickness, and thus remain transparent to some extent. Such transparency can be a problem when the background (eg, a metal frame) is to be covered. These problems can be prevented by integrating a tinted, opaque, milky or turbid film in a dental prosthesis using the film according to the invention. Another way of changing the color as desired is provided by placing a film inside the prosthesis. Thus, the film can be provided directly under the veneer (eg, the outer additional tooth layer) or can be integrated into the veneer itself or between two additional tooth layers.

  The subject of the present invention is thus a dental prosthesis comprising an integrated film, wherein the film is integrated under and / or above a further tooth layer. According to an alternative, the film is integrated under and / or inside the veneer. According to the invention, the film is in contact only with the inner surface of the prosthesis.

  An integrated film will be understood to mean a film embedded in a prosthesis. In particular, the film is at least partly located between two tooth layers or between one tooth portion and one tooth layer. The film is preferably at least partly located between the inner tooth portion and the further tooth layer. In this case, the further tooth layer may be an outer tooth layer and / or an incisor shell. In this alternative, the film is located below the veneer (and inside the beach) on the tooth core.

  The film can also be located between the second further tooth layer and the outer tooth layer. In this case, the film is provided inside the veneer.

  According to a further alternative, the dental prosthesis comprises one, two or more films, in particular between the inner tooth and the further tooth layer and with the second further tooth layer. It can be included between the outer tooth layers (eg in veneers). Similarly, the dental prosthesis may further include a non-integrated film as part of the outer surface of the prosthesis.

  Another subject of the present invention is a dental prosthesis which is at least part of a dental restoration, in particular an individual tooth, preferably a ready-made tooth replacement or a bridge (in particular a multi-unit bridge). Multi-unit bridges can include one, two, three, or four teeth. Similarly, the prosthesis can include a crown, and the inner teeth are preferably present in duplicate form where the film can be placed. The veneer can be applied to the film as a further tooth layer. If the prosthesis is present as a veneer, the film may be present between an inner tooth in the form of a shell and a further tooth as an outer incisor shell.

  Another subject of the present invention is a prosthesis that is designed layered-by-layer and comprises at least part of the inner layer of the film. The dental prosthesis is preferably designed in layers as follows: (i) the inner teeth include PMMA and / or PEMA; (ii) the film can be transparent or opaque And a tough elastic and / or thermoplastic film (eg, PVC film) that can be tinted if desired; (iii) at least one further tooth layer is a PMMA, PEMA, veneer composite Material (especially photocurable veneer composite) or veneer ceramics. According to the present invention, the tough elastic and / or thermoplastic film is a film made of an organic polymer material.

  Another subject of the invention is a prosthesis selected from teeth comprising an integrated film, wherein the teeth comprise at least three parts: (i) inner teeth (in particular (Ii) a film layer; and (iii) at least one further tooth layer. Another subject of the invention is a bridge comprising at least two teeth, wherein each said tooth comprises an inner tooth part provided at least in part with a film layer, said film layer comprising a further The tooth layer (for example, veneer) is at least partially covered.

  According to an embodiment of the dental prosthesis according to the invention, the inner tooth (i) can correspond to a dentin part and at least one further tooth layer (iii) corresponds to an enamel part. Can do. In this type of embodiment, the film layer is preferably located between the dentin part and the enamel part.

  In this context, the inner tooth (i) is preferably capable of including a plurality of tooth layers. The inner teeth in the ready-made tooth replacement correspond to a tooth core similar to enamel. The tooth core preferably includes a lumen which is the base for mounting the prosthesis in the patient's mouth. The at least one further tooth layer (iii) is from one tooth layer (one tooth layer) to a plurality of tooth layers (n tooth layers), for example, one further tooth layer, a second further tooth. Layers and the like can be included. Here, one of the further tooth layers corresponds to the outer tooth layer. The veneer may include an outer or additional tooth layer, a film, and an additional outer tooth layer. Veneers can correspond to the dentin layer in the original tooth.

  Furthermore, the prosthesis comprises (i) an inner tooth (in particular designed as monolithic or laminated) of at least one polymer of acrylate (eg alkyl acrylate), in particular PMMA; preferably a copolymer of acrylates; And / or (ii) may include at least one film layer comprising a tough elastic and / or thermoplastic film, wherein the film comprises the following materials (PVC, acrylate film, PE, PP, LDPE, HDPE, LDPP, HDPP, PUR, polycarbonate); and / or (iii) polymers of acrylates (eg alkyl acrylates; especially PMMA), copolymers of acrylates, veneer composites Materials, dental veneer ceramics (eg, dioxide At least one further tooth layer containing Rukoniumu) may include.

  The film layer preferably has a layer thickness of 50 to 1,000 μm (micrometer), preferably 50 to 250 μm, and more preferably 50 to 170 μm.

  The inner teeth preferably include acrylates or methacrylates, and optionally include organic and / or inorganic filling agents. Common fillers include silicon dioxide, zirconium dioxide, and dental glass.

  In the category of manufacturing artificial teeth in layers, the film layer can be integrated into the tooth and, if desired, at least one further film layer can be introduced and integrated into the tooth. This layer can be applied to any location on the tooth, optionally further on the surface.

  Appropriate film materials are considered for the following criteria: The film is tough and elastic and can be bonded to PMMA either by solution process or chemical bonding (eg chemical reaction) or, if necessary, by surface treatment (eg plasma coating). Preferably it should be.

  If desired, the film layer may be tinted, tinted like a tooth color (shade), and / or opaque. In the experiment, a modified PVC film having a thickness of 140 μm and a melting point of 120 to 170 ° C. was used. However, other film materials that are uniformly bonded to the surrounding tooth material are also suitable.

  The modification of the prosthetic restoration does not affect aesthetics and does not reduce the strength of the teeth. The product meets the material requirements of EN ISO 22112.

  Another subject of the present invention is a dental prosthesis in which the film layer (ii) comprises a transparent, milky or opaque film and can be further tinted if desired. Preferably, the film can be tinted, in particular the film has a yellow hue.

  Furthermore, the dental prosthesis can include a film whose surface is plasma treated or chemically modified. Preferably, the film can be chemically covalently bonded to the inner teeth and / or further teeth. Bonding can preferably be done with a surface modified film that is covalently bonded to the inner teeth and / or further teeth by thermal activation.

  Another subject of the present invention is a method of manufacturing a dental prosthesis and a dental prosthesis obtainable by said method. The method includes (1) providing a film and (2) integrating the film into a prosthesis.

The film
(A) (i) producing an inner tooth in the first step, and (ii) applying and attaching a film to the inner tooth at least partially in the subsequent step, or on the inner tooth And (iii) at least partially applying at least one additional tooth layer to the film and optionally to the area of the inner tooth where no film is provided. Or

  (B) (i) providing at least one further tooth layer, (ii) placing (particularly imparting) a film on the further tooth layer, and (iii) placing an inner tooth on the film. Or

(C) (i) providing (especially arranging) a film, (ii) surrounding the film with inner teeth and / or at least one further tooth layer,
Therefore, it is preferable to be integrated with the prosthesis.
In variant (c) of the above method, the film is preferably clamped to a prosthetic negative mold and then surrounded by a curable and / or polymerizable prosthetic material.

  According to alternative means (c), in placing the film (i), a film (especially a film made of an organic polymer, particularly preferred) that can be clamped between hollow molds (especially negative molds of hollow molds). Use a web-like film). In this situation, the film or web-like film or film web does not need to be cut to a specific size, but rather exits from the hollow mold as shown in FIGS. 1A, 1B, 2A and 2B. It is possible to clamp an entire film or film web (especially a reel) between a plurality of hollow mold negative molds corresponding to ready-made tooth replacements. Is an advantage. According to the method of the present invention, the film need not be drawn. A plurality of ready-made prostheses (especially ready-made tooth replacements) can be produced by film integration based on the method of the present invention.

  According to a further alternative, the method comprises (d) (i) creating at least part of the inner tooth in the first step, and (ii) at least partially in the inner tooth in the subsequent step. And / or place the film on the inner teeth and, optionally, (iii) at least a further portion of the inner teeth on the film and optionally on the inner teeth A step of applying at least partly to an area where no film is provided.

  Preferably, the method may include the following steps: (i) creating an inner tooth in the first step; (ii) applying a film to at least a portion of the inner tooth in the subsequent step. And affixing or placing a film on the inner teeth; optionally (iii) at least a portion of at least one additional tooth layer on the film and optionally on the inner teeth The process of providing to the area | region where the film is not provided. The application of the film is preferably performed by thermal means.

  The outermost further tooth layer preferably corresponds to a veneer or alternatively the veneer corresponds to the following design: further tooth layer, film layer, further tooth layer corresponding to the outer tooth layer.

  According to an alternative, the tooth according to the invention is manufactured by clamping at least one film to the injection mold and then introducing the polymerizable dental polymer mixture into the injection mold under pressure. Is possible.

  Thus, for example, dental cement (especially with PMMA) can be prepared by mixing and can be injected into the mold under pressure to produce the inner teeth. . The dental cement then hardens. Preferably, the film can be suitably clamped in the mold so that the film is integrated into the dental cement and at the same time the inner tooth, film and at least one further tooth layer design is formed.

  Alternatively, the film can be applied to the inner teeth. This can be done, for example, by applying a film to at least a part of the inner teeth and heating the film as desired.

  Accordingly, (i) at least a portion of the inner teeth is formed in the method according to the present invention by 50 to 90% by weight of a powdered polymer (e.g. PMMA; preferably 60 to 70% by weight of PMMA, in particular PMMA-based polymer). And a composition (particularly a polymerizable composition) containing 10 to 50% by weight of monomer (preferably 30 to 40% by weight of monomer). Here, the monomers include, in particular, (meth) acrylates, (meth) acrylate derivatives, and / or cross-linking agents (for example, difunctional and polyfunctional (meth) acrylates). Glycol dimethacrylate is a preferred multifunctional crosslinker. Preferably, the composition is a polymerizable dental cement, the composition is preferably radiation polymerizable, and more preferably a composition polymerizable by thermal means. The composition preferably comprises an initiator for heat-induced radiation polymerization. Preferred initiators include peroxides (eg, dibenzoyl peroxide (BPO)) or N, N-azobisisobutyronitrile = 2,2′-azo-di (isobutyronitrile) (AIBN). Can be mentioned.

  Alternatively, the inner tooth, at least one tooth layer, or veneer may contain 0-50 wt% organic or inorganic filler, 50-90 wt% PMMA, 10-50 wt% monomer (especially (meta ) Acrylates, (meth) acrylate derivatives, and / or crosslinkers) can be produced or obtained. Here, the total of the composition is 100% by weight, and the organic or inorganic filler contains a powdered polymer (especially excluding PMMA). Examples of inorganic fillers include dental glass, glass ceramics, metal oxides (eg, silicon dioxide, zirconium dioxide), ytterbium-containing inorganic fillers, barium-containing inorganic fillers, and strontium-containing inorganic fillers.

  Moreover, it is preferable that an inner tooth layer and a further tooth layer can be independently manufactured from the said composition. For this purpose, it is preferred that the composition is introduced into a negative mold which is in the form of at least a portion of the inner tooth or tooth layer and at least a portion is polymerized. Here, if desired, a separation layer (for example, a separation film) is used. Thereafter, the separating layer can be removed and (ii) replaced by a film. In a further step (iii), a further polymerizable composition is introduced into the negative mold in order to form and polymerize a further part of the inner tooth or tooth layer. The polymerization is preferably performed at 90 to 150 ° C. (preferably 90 to 120 ° C.) at 2 to 10 bar (preferably 3 to 5 bar).

  According to an alternative, (ii) the inner tooth layer comprises a polymer of acrylate (eg alkyl acrylate), in particular PMMA, preferably a monomer comprising a copolymer of (alkyl) acrylate and / or (meth) acrylate. And / or (iii) at least one further tooth layer comprises a polymer of an acrylate (eg (alkyl) acrylate) (especially PMMA), a copolymer of alkyl acrylate and / or a (meth) acrylate, Or a dental veneer composite material (especially photocurable veneer composite material), dental veneer ceramics, and zirconium dioxide are included.

  The inner tooth, the at least one tooth layer or further tooth layer, and / or the veneer preferably comprise the following polymer, optionally a copolymer containing a cross-linking agent, or a polymer of the following monomers, and preferably Are based on powdered polymers such as (alkyl) acrylates such as PMMA, PEMA and / or copolymers based on (meth) acrylates and crosslinkers such as UDMA, bis-GMA, EGDMA . Alternatively, inorganic fillers can additionally be present.

  The inner teeth or tooth layers are polymerized containing 50-90% by weight of a powdered polymer (eg PMMA) and 10-50% by weight of monomers (especially including (meth) acrylates, (meth) acrylate derivatives) It is preferable to manufacture from an ionic composition.

What is considered as a monomer is at least one monomer or a mixture of monomers,
(A) Methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, n-hexyl methacrylate, 2-phenoxyethyl methacrylate, isobornyl methacrylate, isodecyl methacrylate, polypropylene-glycol-mono-methacrylate, tetrahydrofuryl-methacrylate, methyl Acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, n-hexyl acrylate, 2-phenoxyethyl acrylate, isobornyl-acrylate, isodecyl acrylate, polypropylene-glycol-mono-acrylate, tetrahydrofuryl-acrylate, hydroxyethyl acrylate, hydroxypropyl Acrylate, hydroxyethyl methacrylate , Hydroxypropyl methacrylate, benzyl (meth) acrylate, furfuryl (meth) acrylate, or phenyl (meth) acrylate, a mixture containing at least one of the above (meth) acrylates, and / or the above monomers A copolymer comprising one or at least two of: and / or
(B) 1,4-butanediol-dimethacrylate (1,4-BDMA) or pentaerythritol-tetraacrylate, bis-GMA-monomer (bisphenyl-A-glycidyl-methacrylate), triethylene glycol dimethacrylate (TEGDMA) , And diethylene glycol dimethacrylate (DEGMA), tetraethylene glycol di (meth) acrylate, decanediol di (meth) acrylate, dodecanediol di (meth) acrylate, hexyldecanediol di (meth) acrylate, trimethylolpropane tri (meta) ) Acrylate, pentaerythritol tetra (meth) acrylate, and butanediol di (meth) acrylate, ethylene glycol-di (meth) acrylate, polyethylene Recall-di (meth) acrylate, ethoxylated / propoxylated bisphenol A-di (meth) acrylate, a mixture containing at least one of the above (meth) acrylates, and / or one of the above monomers Di- and / or multi-crosslinkers, including species or copolymers comprising at least two.

  What can be considered as a polymer (especially as a powdery polymer, in particular as a bead polymer) is a polymer comprising a polymer in the form of a polymer powder, optionally crosslinked and containing a polyalkyl (meth) acrylate present as a homopolymer or copolymer Particles. Here, the above polymers are methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, n-hexyl methacrylate, 2-phenoxyethyl methacrylate, isobornyl methacrylate, isodecyl methacrylate, polypropylene-glycol-mono-methacrylate, tetrahydrofuryl. -Methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, n-hexyl acrylate, 2-phenoxyethyl acrylate, isobornyl acrylate, isodecyl acrylate, polypropylene-glycol-mono-acrylate, tetrahydrofuryl-acrylate, hydroxy Ethyl acrylate, hydroxypropyl acrylate, hydroxy ester Methacrylate, hydroxypropyl methacrylate, at least one monomer comprising a (meth) acrylate group selected from the group consisting of a mixture containing at least one of the above (meth) acrylates, and / or the above It is preferably based on copolymers, polyamide particles, polyamide fibers containing one or at least two of the monomers. In this case, polymethyl methacrylate (PMMA) is particularly preferred. Still further, the polymeric particles can include a mixture of dental monomers, such as MMA, and at least one cross-linking agent.

  Polymeric particles and / or chip-like polymers, powdered components containing polymethylmethacrylate (PMMA) beads, and / or comonomer being polymerized include styrene, α-methylstyrene, vinyl toluene, substituted vinyl toluene (eg , Vinyl benzyl chloride), vinyl halide (eg, vinyl chloride), vinyl ester (eg, vinyl acetate), heterocyclic vinyl compound (eg, 2-vinyl pyridine), vinyl acetate, and vinyl propionate, butadiene , Isobutylene, 2-chlorobutadiene, 2-methylbutadiene, vinylpyridine, cyclopentene, (meth) acrylic acid esters (eg, methyl methacrylate, butyl methacrylate, butyl acrylate, and hydroxyethyl methacrylate) Furthermore, acrylonitrile, maleic acid and maleic acid derivatives (for example, maleic anhydride), fumaric acid and fumaric acid derivatives (for example, fumaric acid ester), acrylic acid, methacrylic acid, aryl (meth) acrylate (for example, Benzyl methacrylate) or phenyl methacrylate, and optionally mixtures of the above comonomers.

  Furthermore, the present invention preferably comprises a monomer and a powdered polymer in the presence of at least one initiator or initiator system for self-polymerization, radiation curing (especially UV curing), thermal polymerization or dual curing. It comprises an inner tooth, at least one tooth layer, and at least one further tooth layer made of a prosthetic material that can preferably be obtained by reacting.

  According to a particularly preferred alternative of the above method, a PVC film, in particular having a layer thickness of 50-170 μm, preferably about 140 μm, is applied to the inner teeth and heated to its melting range. Preferably, the film used in this context has a melting point of 120-170 ° C. In general, if the film is applied separately by thermal techniques, the melting point of the film material should be lower than the melting point of the material of the inner teeth and / or at least one further tooth layer. If the film is clamped in the mold and unpolymerized dental cement is filled in the mold, the melting point of the film should be higher than its polymerization temperature. Accordingly, another subject of the invention is that the film has a melting point of 120-170 ° C. and the film is surrounded by a polymerizable (especially thermal, low temperature, or self-polymerizing) composition or the composition is It is the method of manufacturing the inner tooth part of the prosthesis provided to the film. Thereafter, the composition can be subjected to thermal polymerization at a selected melting point of the film.

  Alternatively, the film can then be applied to apply at least one further tooth layer on the film, in particular, pressed against a part of the prosthesis in the mounting method, or Can be contracted on the same part.

  According to the method of the present invention, the film is at least partially integrated into the dental prosthesis.

  The material of the film, inner teeth and at least one further tooth layer can be formed from the materials described above.

  Another subject of the present invention is a method for producing a dental prosthesis comprising an integrated film, in particular a tooth comprising an inner tooth part, at least partly provided with a film layer. Here, the film layer is at least partially covered by at least one further tooth layer (particularly a veneer).

  Another subject of the present invention is the use of a film to produce a prosthesis comprising an integrated film. According to a further alternative, the subject of the invention is a film (especially tough and / or tough) for producing ready-made tooth replacements, crowns, veneers or bridges comprising an integrated film. Use of thermoplastic film or plastic film). Furthermore, the film is preferably opaque and / or tinted. The film preferably has a yellow hue.

  A tough elastic film is a film that can change its elongation when a force is applied, and at least partially restores its original shape when the application of this force is stopped. Will be understood. It is preferable that the tough elastic film can be manufactured from PVC, polyacrylate, PE, PP, polystyrene, polybutadiene-containing material or the like. It is preferred that the tough elastic film can be manufactured from an elastomer. Elastomers include natural rubber, polybutadiene-containing polymers, polystyrene-containing polymers, and silicone rubber. It will be understood that a plastically deformable film is a film that exhibits irreversible deformation in response to an applied load when the load exceeds a threshold (yield strength).

  Another subject matter of the invention is in particular one or more prostheses which can be obtained according to a method that allows the production of a plurality of ready-made tooth replacements by the integration of films.

  The invention is not limited to the exemplary embodiments described above, but is illustrated in more detail in the following examples. The present invention will be illustrated in detail based on the following drawings.

  In the scope of layer-wise manufacture of artificial teeth, the film layer was placed in a dental prosthetic negative mold and integrated into the tooth. A modified PVC film having a thickness of 140 μm and a melting point of 120-170 ° C. was used. However, other film materials that can be uniformly bonded to the surrounding dental material can also be used.

  In the first step of production, a paste based on a mixture of PMMA and methacrylate was placed in a production mold. A simple example of a suitable paste amount is a mixture of 60-70% PMMA-based polymer, 30-40% methacrylate-based monomer, and crosslinkers (eg methyl methacrylate and glycol dimethacrylate). This mixture was made using a swelling process to have the appropriate viscoelastic density.

  After applying additional separation film and placing the upper part of the mold, the first layer was prepolymerized at 90-120 ° C. This prepolymerization was carried out in a hydraulic hot press as radiation polymerization initiated by peroxide.

  After removing the separation film, the special film to be integrated is placed on the prepolymerized layer and the next layer is also applied in paste form or, if present, using an injection channel. And then poured into a previously closed mold. In this context, it is important to apply sufficient pressure in the mold and allow the paste material to act on the film for some time during the heating period of the mold. About 3-5 minutes is sufficient to reach the apparent polymerization temperature. After the object present in the mold is cured, the mold can be opened. The film is affixed between two layers of the material.

  If necessary, additional layers can be added in a similar manner. After the manufacture of the last layer of teeth is complete, the teeth are removed from the surrounding plastic material. Any burrs remaining on the teeth due to the separated end of the mold are subsequently removed by either automatic deburring means or manual deburring means using a manual finishing device. Automatic deburring is preferably done by laser, but can also be done using any common vibration finishing or barrel deburring method.

  Visual analysis of the cross-sectional images in FIGS. 1C and 1D clearly shows the profile of the film layer between the first tooth layer (incisor shell) and the second tooth layer (dentin). If a tooth breaks due to force, the fragments are in a flexible attachment to the remaining teeth, as evidenced from FIGS. 1G and 1H.

  This piece can be cut just by pulling the part further away and breaking the film.

  Teeth modification with the film according to the present invention did not affect aesthetics and did not reduce tooth strength. The product meets the material requirements of EN ISO 22112.

  FIG. 3 shows a schematic view of a ready-made tooth replacement according to the present invention produced using the method according to the present invention. The film layer 2 is integrated under the layer of the incisor shell 1 corresponding to the further tooth layer. The film layer 2 is applied to the inner tooth portion 3.

0 Ready-made tooth replacement 1 Incisor shell 2 Film layer 3 Inner teeth

Claims (16)

  A dental prosthesis, wherein at least one film layer is integrated into the dental prosthesis.   The prosthesis according to claim 1, characterized in that the prosthesis is at least part of a dental restoration (especially a single tooth, veneer, crown, bridge (especially a multi-unit bridge)).   The prosthesis according to claim 1 or 2, wherein the prosthesis is designed in a layered manner, and at least a part of the prosthesis includes at least one film located inside. The dental prosthesis is a tooth comprising at least one integrated film;
The tooth has at least three parts:
(I) inner teeth,
The prosthesis according to any one of claims 1 to 3, characterized in that it comprises (ii) a film layer, and (iii) at least one further tooth layer. The inner tooth (i) is a copolymer of (alkyl) acrylate (eg PMMA, PEMA) and / or a copolymer based on (meth) acrylate and a crosslinker (eg UDMA, bis-GMA) EGDMA) and / or
The film layer (ii) comprises a tough elastic and / or thermoplastic film and / or
The at least one further tooth layer (iii) comprises at least one polymer of (alkyl) acrylate, a copolymer, a veneer composite, and / or a dental veneer ceramic (eg zirconium dioxide), The prosthesis as described in any one of Claims 1-4.   The film layer (ii) includes a film containing PVC, acrylate, PE, PP, LDPE, HDPE, LDPP, HDPP, PUR, polycarbonate, and / or a mixture containing any one of these polymers. The prosthesis according to any one of claims 1 to 5.   The prosthesis according to any one of claims 1 to 6, wherein the film is tinted (in particular, the film has a yellow hue).   The prosthesis according to any one of claims 1 to 7, wherein the surface of the film is plasma-treated or chemically modified. (1) providing a film;
(2) The step of integrating the film into the prosthesis according to the following (a) or (b) or (c) or (d);
A method of manufacturing a dental prosthesis, comprising:
(A) (i) producing an inner tooth in the first step, and (ii) applying and affixing a film to the inner tooth at least partially in the subsequent step, or on the inner tooth And, optionally, (iii) at least partially applying at least one additional tooth layer to the film and optionally to an area of the inner tooth where no film is provided. Or (b) (i) providing at least one further tooth layer, (ii) applying a film on the further tooth layer, and (iii) placing an inner tooth on the film, Or (c) (i) placing a film, (ii) surrounding the film with the inner teeth and / or the at least one further tooth layer, or (d) (i) in the first step, Few inner teeth And (ii) in the subsequent step, at least partially applying and affixing a film to the inner teeth, or placing a film on the inner teeth, and if desired, (Iii) at least partially applying at least a further portion of the inner teeth to the film and optionally to the area of the inner teeth not provided with the film.   The method of claim 9, wherein the film is at least partially integrated with the dental prosthesis.   11. The method according to claim 9 or 10, characterized in that the film comprises a tough elastic and / or thermoplastic film. (I) the inner teeth are
(A) 50-90% by weight of a powdered polymer (eg PMMA) and 10-50% by weight monomer, or
(B) 0 to 50% by weight of organic or inorganic filler, 50 to 99% by weight of PMMA, 10 to 50% by weight of monomer (wherein the total composition is 100% by weight),
Produced from a polymerizable composition comprising
(Ii) the inner tooth layer comprises a polymer comprising an acrylate (eg alkyl acrylate) (especially PMMA), preferably a copolymer of (alkyl) acrylate, and / or a monomer comprising (meth) acrylate, and / or
(Iii) a monomer or dental veneer wherein said at least one further tooth layer comprises a polymer of acrylate (eg alkyl acrylate) (particularly PMMA), a copolymer of (alkyl) acrylate, and / or (meth) acrylate The method according to any one of claims 9 to 11, characterized in that it comprises a composite material, dental veneer ceramics, zirconium dioxide.   The method produces a dental prosthesis comprising an integrated film, in particular a tooth comprising an inner tooth part provided with a film layer at least in part, wherein at least a part of the film layer is a further tooth 13. Any of claims 9 to 12, characterized in that it is covered by a layer, whereby preferably a plurality of prostheses (especially ready-made tooth replacements) are produced by integration of the film. The method according to one item. (C) (i) placing the film comprises clamping the film (especially a web-like film) to one or more hollow mold negative molds of a ready-made tooth replacement;
14. A method according to any one of claims 9 to 13, characterized in that (ii) the film is surrounded by the inner teeth and / or the at least one further tooth layer.   A prosthesis obtainable on the basis of the method according to any one of claims 9 to 14.   Use of the film in the manufacture of ready-made tooth replacements comprising an integrated film.